1440140625 has 252 divisors, whose sum is σ = 3473393040. Its totient is φ = 567000000.

The previous prime is 1440140623. The next prime is 1440140633. The reversal of 1440140625 is 5260410441.

It is not a de Polignac number, because 1440140625 - 2¹ = 1440140623 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1440140623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 251 ways as a sum of consecutive naturals, for example, 75796866 + ... + 75796884.

Almost surely, 2^1440140625 is an apocalyptic number.

1440140625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440140625 is an abundant number, since it is smaller than the sum of its proper divisors (2033252415).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440140625 is an equidigital number, since it uses as much as digits as its factorization.

1440140625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1440140625 is about 37949.1847738525. The cubic root of 1440140625 is about 1129.2799926806.

The spelling of 1440140625 in words is "one billion, four hundred forty million, one hundred forty thousand, six hundred twenty-five".